Year,Value,NumPoints 1900,0.530271,422 1901,-1.18173,420 1902,-0.0472028,411 1903,-1.36896,411 1904,0.45803,416 1905,3.34874,416 1906,-0.855772,410 1907,-2.77652,416 1908,0.25571,422 1909,-1.90582,412 1910,-1.20729,422 1911,-0.712421,416 1912,1.2742,416 1913,-0.664257,418 1914,-1.64071,416 1915,1.62397,415 1916,-0.0899038,415 1917,-1.47091,415 1918,-2.32309,418 1919,-2.10537,416 1920,-1.36055,413 1921,-0.754666,416 1922,-0.119471,425 1923,1.17086,423 1924,-1.41229,423 1925,0.182005,425 1926,1.26242,425 1927,-1.57456,423 1928,-1.06146,425 1929,-0.0423191,427 1930,0.607356,424 1931,0.202493,427 1932,1.13454,443 1933,0.158036,443 1934,0.85508,443 1935,0.0788601,427 1936,0.222243,443 1937,0.738585,443 1938,0.299627,443 1939,2.3728,443 1940,3.49164,443 1941,0.629715,443 1942,0.482936,443 1943,0.252223,443 1944,1.99504,429 1945,-2.0044,429 1946,-0.598847,443 1947,-0.56419,443 1948,-1.53926,443 1949,-1.37684,443 1950,-1.18409,443 1951,0.313159,443 1952,0.960885,443 1953,3.50891,443 1954,-1.35645,443 1955,-0.267926,443 1956,0.70723,445 1957,0.273008,445 1958,-0.459776,445 1959,-0.662579,445 1960,-1.00895,445 1961,-0.514136,445 1962,0.100685,445 1963,1.44443,445 1964,-1.72565,445 1965,0.580452,445 1966,-1.23236,445 1967,-0.704242,445 1968,0.0304872,445 1969,0.355807,445 1970,-0.65184,445 1971,-0.203561,445 1972,-2.56431,445 1973,-0.0451595,445 1974,-0.797685,445 1975,0.488878,445 1976,1.30824,445 1977,0.788141,445 1978,0.126326,445 1979,0.552913,445 1980,0.6631,445 1981,-0.336069,445 1982,-1.35798,445 1983,-0.311954,445 1984,0.272157,445 1985,-2.13159,445 1986,-1.10764,445 1987,-0.458078,445 1988,1.69119,445 1989,1.71558,445 1990,1.17275,445 1991,0.600237,445 1992,-0.942868,445 1993,1.05577,445 1994,0.900549,445 1995,3.64736,445 1996,1.51691,445 1997,0.959817,445 1998,3.68503,445 1999,1.92578,445 2000,1.16869,445 2001,1.01128,445 2002,-1.36365,445 2003,1.4636,445 2004,1.37528,445 2005,2.20954,445 2006,1.60802,445 2007,2.50473,445 2008,1.13318,445 2009,1.02338,445 2010,4.85066,445 2011,-0.992133,445 2012,2.06412,445 2013,-0.276788,445 2014,0.631497,445 2015,1.23761,445 2016,2.76142,445 2017,1.25595,445 2018,0.891122,445 2019,2.26514,445 2020,2.40301,445 2021,2.05463,445 2022,0.569217,445 2023,1.32622,445